Models.dev

An open-source database of AI models

GPT-5.3 Chat (latest)

Chat-tuned GPT model for conversational assistance, writing, and tool workflows

openai/gpt-5.3-chat-latest
Lab
OpenAI
Family
gpt
Providers
4
Context
128,000
Output limit
16,384
Knowledge
2025-08
Release
2026-03-03
Updated
2026-03-03
Weights
Closed
Input
Output types
Capabilities
tools, structured, temperature

Providers

4
Provider Lab Model ID Context Output Price Reasoning Tool Call Structured Temperature
LLM GatewayOpenAIgpt-5.3-chat-latest128,00016,384$1.75 / $14.00NoYesYesYes
Merge GatewayOpenAIopenai/gpt-5.3-chat-latest128,00016,384$1.75 / $14.00NoYesYesYes
OpenAIOpenAIgpt-5.3-chat-latest128,00016,384$1.75 / $14.00NoYesYesYes
OrcaRouterOpenAIopenai/gpt-5.3-chat-latest128,00016,384$1.75 / $14.00NoYesYesYes
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Models.dev is a comprehensive open-source database of AI model specifications, pricing, and features.

The homepage starts with provider-agnostic model metadata. Model pages list the providers serving that model; provider pages list every model available from that provider; lab pages group canonical models by author.

API

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Logos

Provider logos are available at /logos/{provider}.svg where {provider} is the provider ID. Lab logos are available at /logos/labs/{lab}.svg.

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The data is stored in GitHub as TOML files organized by provider and canonical model.